TUSB1064: schematic and layout review

Hi Jeff,

Please send the files over to me.

Hi Vishesh,

I've send you via privacy message. thanks!

Jeff

Thanks Jeff, 

Ill have a look and get back to you by end of today

Hi Jeff,

Here is the schematic review:

TUSB1064_Schematic_Review_DUD3950D1(3_19_2025).pdf

For the the USB-C upstream connector will the customer be using 4 lane DP, or 2 lane DP + USB, or both? This is an odd connection, can you explain this one?

We must make sure the proper USB-C pinout are used.

4-lane DP:

2 Lane DP + USB:

The ESD used may have too high of a clamping voltage, look for something closer to 6V clamping.

I'm working on the layout review now

Hi Jeff,

Thanks for your patience.

Here is the review:

1) improper differential routing seen in the highlighted areas. Additionally, the vias with high speed signals do not have ground reference vias. Both of these issues will result in improper coupling of the signals and incorrect impedence matching and signal integrity.

2) output traces look ok, for top layer

3) Odd differential routing here:

4) What connects here?
 

Can the customer update and send for re-evaluation?

Hi Vishesh,

4) is test point, it not GND via, seem it no need GND reference vias, right?

1) You mean red mark routing should be differential as yellow mark one, right?

3) and item 3 you mean these 2 yellow mark need follow above item 1 yellow mark routing, right?

Thanks!

jeff

Hi,

Got it, thanks!

Jeff